US PATENT SUBCLASS 192 / 84.31
.~.~.~.~ And electromagnet

Current as of: June, 1999
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192 /   HD   CLUTCHES AND POWER-STOP CONTROL

30 R  DF  CLUTCHES {15}
82 R  DF  .~ Operators {18}
84.1  DF  .~.~ Electric or magnetic {8}
84.3  DF  .~.~.~ Including permanent magnet {1}
84.31.~.~.~.~ And electromagnet

DEFINITION

Classification: 192/84.31

And electromagnet:

(under subclass 84.3) Subject matter, wherein a field produced by the flow of electric current in a coiled conductor also affects engagement of the clutch parts.